![Dr. Claudia Krebs 💉💉💉💉+😷 on Twitter: "Hello #anatomy twitterers! Why do preganglionic sympathetic fibres go through the white ramus communicans, which is distal, and then loop back through the grey ramus onto Dr. Claudia Krebs 💉💉💉💉+😷 on Twitter: "Hello #anatomy twitterers! Why do preganglionic sympathetic fibres go through the white ramus communicans, which is distal, and then loop back through the grey ramus onto](https://pbs.twimg.com/media/EEOn3mFVAAAFmFu.jpg)
Dr. Claudia Krebs 💉💉💉💉+😷 on Twitter: "Hello #anatomy twitterers! Why do preganglionic sympathetic fibres go through the white ramus communicans, which is distal, and then loop back through the grey ramus onto
Selective block of grey communicantes in upper thoracic sympathectomy. A feasibility study on human cadaveric specimens
![Anatomical study and clinical significance of the rami communicantes between cervicothoracic ganglion and brachial plexus - Song - 2010 - Clinical Anatomy - Wiley Online Library Anatomical study and clinical significance of the rami communicantes between cervicothoracic ganglion and brachial plexus - Song - 2010 - Clinical Anatomy - Wiley Online Library](https://onlinelibrary.wiley.com/cms/asset/16dffa88-e9d8-4ecf-a20d-f1116b3b9ac5/mfig001.jpg)